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Finding the Fourth Proportional to 69,364.80, 103,816.80 and 48,628.80

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Solution

The fourth proportional to 69,364.80, 103,816.80 and 48,628.80 is: 72,781.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,364.80 : 103,816.80 = 48,628.80 : x
  2. Step 2: Convert to fraction form
    69,364.80/103,816.80 = 48,628.80/x
  3. Step 3: Cross multiply
    69,364.80x = 103,816.80 × 48,628.80
  4. Step 4: Simplify right side
    69,364.80x = 5,048,486,403.84
  5. Step 5: Solve for x
    x = 5,048,486,403.84/69,364.80
  6. Step 6: Final answer
    x = 72,781.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.